The RGMGM-79 GM/GM is a Gunpla that appears in Gundam Build Fighters: GM's Counterattack. It is piloted by Gunpla Mafia member E

Uniquely customized by the Gunpla Mafia, the GM/GM served as the organization's main Gunpla.[1] "GM" at the front of the name is the abbreviation for Gunpla Mafia, who has started renewed activities at the same time as Yajima Trading has revived the Gunpla Battles.[1] Based on the mass produced GM from Mobile Suit Gundam, it features maximized movability and improved mobility, yet maintains the high applicability to mass production.[1][2] Characterized by no particular features, the Builders belonging to the Gunpla Mafia customized it as they liked for their own use